Median line-of-sight velocity dispersions (along with z-axis) of pressure-dominated galaxies in EAGLE-50 measured within a cylindrical volume with an aperture of 10 kpc (blue triangles). The error bar indicates the 1σ standard deviation in each stellar mass bin. For comparison, the median velocity dispersions are measured within 3 kpc (solid black line), and the half-mass radius is defined by the stellar particles (dashed red line).